Telephone system



June 3, 1941. E. ERWIN TELEPHONE SYSTEM Filed Feb. 1l, 1938 27 Sheets-Sheet l Q .um Q @t Qu @G @t Q @t E w Q S @t @..w mw ww @t Rut @Nut NGC. w @N wm but Q Qu .QR n .um

@t GQ um N .um

NWN

QQN

N w WM NL l5. W

DVD

June 3, 1941. E. L. ERwlN 2,244,004

TELEPHONE SYSTEM Filed Feb. 11, 1958 27 Sheets-Sheet 2 m f r 'U 4" 1| 4|' 41 I l n g l IlHl il* @L @L L I s g a t.

l l l L l L l, n, "-T

l I l s 84 /fvl/.E/s/rof?4 4 By EILERW/N WfWqM ATmRA/EP June 3, 1941. E. L. ERwlN TELEPHONE SYSTEM Filed Feb. l1. 1938 27 Sheets-Sheet 3 /NVENTOR E L .ERW/N ArmRA/Ey June 3, 1941. E, ERwxN TELEPHONE SYSTEM Filed Feb. 1l, 1958 27 SheebS--Sheeil 4 *Illll'llllrlllljl'lllll m. .Ubi

INVENTOR B E L. E RW/N www ATTORNEY .June 3, 1941.. E. L. ERWIN TELEPHONE SYSTEM Filedl Feb. 1.1, 1933 27 Sheets-Sheet 5 /NVENTOR Lm/WN @y Www WW ATTORNEY June 3,. 1941. E, L ERWIN TELEPHQNE SYSTEM Filed Feb. ll, 1938 27 lSl'leets-Shet 6 /Mf/vmR by ELERW/N www ATroRA/Ei/ June 3, 1941. E. L ERWIN' 2,244,004

TELEPHONE SYSTEM Filed Feb. ll, 1938 27 Sl'le'lZs--Sllee`ll 7 F/Rsr TEN/AHV' INI/ENTOR E. L ERW/N erw" ATTORN V June 3, 1941. E, L ERWIN 2,244,004

TELEPHONE SYSTEM Filed Feb. 11, 1958 '27 sheets-sheet s .mll

THIRD TERT/ARV /NVENTOR E L. [RW/N By m4 n ATTOR EV E. L. ERWIN TELEPHONE: SYSTEM June 3, 1941.

Filed Feb. 11, 1958 ,mw plm 27 Sheets-Sheet 9 BVW" /Nl/ENTOR E. L E RW/N Armp/VEV June 3, 1941. E. L. ERwlN 2,244,004

TELEPHONE SYSTEM Filed Feb. 1l, 1938 2'( Sheets-Sheet 10 HUNDREDS FIRST RECORDER /NVENTOR E L. ERWN Filed Feb. ll, 1938 27 Sheets-Sheet 1l m m w m m u /NVEA/TOR E. L FEW/IV June 3, 1941.. E. l. ERwxN I TELEPHONE `SYSTEM Filed Feb. l1, 1958 27 Sheets-Sheet 172 /M/EN7DR By EL ERW/N www June 3, 1941. E, L .ERwlN 2,244,004

TELEPHONE SYSTEM Filed Feb. ll, 1938 27 Sheets-Sheet 13 A TTORNEV June 3, 1941. E. l.. ERwlN TELEPHONE SYSTEM Filed Feb. 11. 193s 27 Sheets-Sheet 14 /M/ENTOR E. L. .mw/N @y WWW June 3, 1941. E. L. ERwiN TELEPHONE SYSTEM Filed Feb. 11, 1958 27 Sheets-Sheet 15 QMQQQQMQ Ruft /M/EA/on/ E. L .fR/N

ATTORNEY June 3, 1941. EJ., ERWIN TELEPHONE SYSTEM Filed Feb. 11, 1938 27 Sheets-Sheet 16 1, TUR/VE? June 3 1941. E. L, ERWIN 2,244,004

TELEPHONE SYSTEM Filed Feb. 1l, 1958 27 Sheets-Sheet 17 W5/v TOR E L. E RW//V 7' TOR/VE V E. L.. ERWIN June 3, 1941.

TELEP'ONE SYSTEM Filed Feb. ll, 1938 27 Sheets-Sheet 18 OQQ /A//ENTOR ELERW/N June 3, 1941. E. L. ERWIN 2,244,004

TELEPHONE SYSTEM Filed Feb. l1, 1938 27 Sheets-Sheet 19 /NVENTOR E. L ERW/N June 3, 1941. E. L. ERWIN .2,244,004

TELEPHONE SYSTEM Filed Feb. ll, 1938 27 Sheets-Sheet 20 TEN LINES COMMON GROUPS /NVENTOR E L. [RW/N TTORNE V 

